Abstract:
Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide.
Abstract:
A lubricating grease having a high dropping point, good stability against oxidation and long life contains a thickener comprising essentially the three components: lithium soap of C 12-24 hydroxy fatty acid; lithium phosphate salt produced from phosphoric or phosphorous acid ester and dilithium borate. The amounts of hydroxy fatty acid and phosphoric or phosphorous acid ester are 3-100 parts by weight and 0.05-15 parts by weight per part by weight of boric acid respectively.
Abstract:
Crystalline aluminates of the formula: I. (LiA x ) y ·2Al(OH) 3 ·nH 2 O II. Li(R) v r 2Al(OH) 3 ·nH 2 O, or III. M m (R) v r (D) w z 2Al(OH) 3 ·nH 2 O wherein A is one or more anions and/or negative-valence radicals or mixtures thereof; wherein, in formula I, x is a quantity of A ions or radicals sufficient to substantially satisfy the valence requirements of Li; wherein n is zero or the number of waters of hydration; wherein y is a numerical value at least sufficient to maintain the crystalline structure; wherein R is a monocarboxylic acid or dicarboxylic acid of C 6 -C 22 , including those which are OH - substituted; wherein r is greater than zero and represents the number of R ions in the molecule; wherein v is the valence of R, being monovalent or divalent; wherein M is divalent Zn or Ca cations; wherein D represents inorganic anions of valence 1-3, represented by w; wherein z is equal to or greater than zero and represents the number of D anions; wherein, in formula II, vr represents an amount of R anions to substantially satisfy the valence requirements of Li; wherein, in formula III, r>z and (vr + wz) represents an amount of combined anions, R and A, to substantially satisfy the valence requirements of M; with m representing the number of divalent M cations and having a numerical value in the range of 1 to 4. are found to improve the coefficient of friction and antiwear properties of lubrication fluids subjected to shearing, rubbing, or grinding forces at elevated pressure. Also, useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates of formula 1.
Abstract:
본 발명은 불포화 또는 포화 지방산의 아민 염 하나 이상이 베이스 오일 및 증점제를 포함하는 그리스 베이스 물질에 혼입되고, 바람직하게는 하기 화학식 (1) 의 지방산 아민 염 하나 이상이 혼입되는, 수지 윤활에 사용하기 위한 그리스 조성물에 관한 것이다: RCOO - R'NH 3 + (1) [식 중, (i) R 은 15 내지 21 개의 탄소 원자를 갖는 불포화 탄화수소기이고, R' 은 8 내지 22 개의 탄소 원자를 갖는 포화 또는 불포화 선형 또는 분지형 탄화수소기이거나; (ii) R 은 5 내지 21 개의 탄소 원자를 갖는 선형 포화 탄화수소기이고, R' 은 16 내지 18 개의 탄소 원자를 갖는 불포화 탄화수소기임]. 본 발명의 그리스 조성물은 수지와 수지, 또는 수지와 다른 물질 예컨대 금속 사이의 윤활성을 증진시킨다.
Abstract:
An adhesive grease composition comprises a random copolymer of ethylene and an alpha-olefin having the following formula wherein R represents a lower alkyl group, x and y are, respectively, an integer provided that x/y=0.5 to 2.0 and x+y=50 to 150, and a thickening agent in defined amounts.
Abstract:
PROBLEM TO BE SOLVED: To provide a lubricative defoamer composition that triggers adverse effects such as inhibition of cooling action, a change of a hydraulic pressure, and promotion of oxidative deterioration, and eventually prevents a hardware fault of a transmission, etc., as well as to provide a method for defoaming using the composition.SOLUTION: This defoamer composition defoams bubbles generated from a lubricating oil present in a container, uses grease, and is such gel-like as NLGI No.1 grade or harder to apply to the inner wall of the container. The defoamer composition includes a fluorinated oil as a base oil, and tribasic calcium phosphate as a thickener.